BCS CTFL4 Exam - Topic 6 Question 21 Discussion

Actual exam question for BCS's CTFL4 exam

Question #: 21
Topic #: 6

A financial institution is to implement a system that calculates the interest rates paid on investment accounts based on the sum invested.

You are responsible for testing the system and decide to use equivalence partitioning and boundary value analysis to design test cases. The requirements describe the following expectations:

Investment range | Interest rate

R500 to RIO 000 10%

RIO 001 to R50 000 11%

R50 001 to RlOOOOO 12%

RIOOOOl to R500 000 | 13%

What is the minimum number of test cases required to cover all valid equivalence partitions for calculating the interest?

D16

Show Suggested Answer

Suggested Answer: C

Statement coverage is a metric used in white-box testing that measures the percentage of executable statements in the code that have been executed by the test cases. It is calculated as the number of statements executed by the tests divided by the total number of executable statements in the code, providing an indication of how much of the code has been tested.

by Marion at Jan 14, 2025, 09:09 AM

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Layla

5 months ago

I thought it might be more, like 5 or 6.

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Rory

5 months ago

Definitely 4, that covers all the ranges perfectly!

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Sophia

5 months ago

Wait, are we sure about that? What if we missed a boundary?

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Merilyn

6 months ago

I agree, 4 seems right for the partitions.

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Jeanice

6 months ago

Looks like we need at least 4 test cases for those ranges.

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Amos

6 months ago

I believe we should focus on the edges of each range, but I'm confused about how many total cases that would make.

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Mica

6 months ago

I'm not entirely sure, but I feel like we might need more than 4 test cases because of the boundaries.

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Vincenza

6 months ago

I remember practicing a similar question, and I think we might need at least 5 cases to cover all partitions properly.

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Paulina

7 months ago

I think we need to identify the boundaries for each range to determine the minimum test cases.

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Marg

7 months ago

I'm a bit unsure about how to approach this. Should I just test the midpoint of each range, or do I need to consider the boundaries as well? I want to make sure I get this right.

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Nu

7 months ago

Okay, I see the different investment ranges and corresponding interest rates. I'll need to make sure I cover the lower and upper bounds of each range to fully test the system.

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Harrison

7 months ago

Hmm, let me think this through. We have four investment ranges, so I'll need to identify the boundary values for each range. That should give me the minimum number of test cases.

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Frank

7 months ago

This looks like a straightforward application of equivalence partitioning and boundary value analysis. I think I can handle this one.

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Kanisha

1 year ago

Wait, is this a trick question? What if the system can only handle 4 test cases? Then option B is the way to go, right? Unless, of course, the system is bulletproof and can handle all 16 test cases. In that case, I'm going with the option that has the most test cases - D!

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Mattie

11 months ago

I agree, let's go with option D to ensure thorough testing.

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Lashaun

11 months ago

That's a good point. Maybe we should consider option D to cover all possibilities.

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Hui

11 months ago

But what if we miss some important scenarios with only 4 test cases?

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Tina

12 months ago

I think we should go with option B, just to be safe.

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Refugia

1 year ago

Woah there, slowpoke! You're forgetting about the edge cases. We need to test the absolute minimum and maximum values for each partition, plus a few in the middle. That's 16 test cases, no doubt. D is the way to go.

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Shawnda

1 year ago

This is a piece of cake! All we need to do is test the midpoint of each partition, so that's 4 test cases. Easy peasy. I'll go with option A.

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Carmen

1 year ago

I'm not sure, but I think we need to cover each partition with at least one test case, so the answer should be A) 5.

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Antione

1 year ago

I agree with Susana, because we have 4 valid equivalence partitions and 1 invalid partition.

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Samira

1 year ago

Hmm, I'm not so sure. With four partitions, we need to test the upper and lower bounds of each one, so that's 8 test cases. Plus, we should probably throw in a few extra cases just to be thorough. I'm going with option C - 8 test cases.

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Lilli

11 months ago

I agree, option C - 8 test cases seems like the best choice.

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Heidy

11 months ago

I think you're right. We do need to test the upper and lower bounds of each partition.

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Jina

1 year ago

Okay, let's think this through. We have four equivalence partitions, so the minimum number of test cases would be four to cover all of them. But we also need to consider the boundary values, so that adds a few more. I'd go with option B - 4 test cases should do the trick.

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Susana

1 year ago

I think the answer is A) 5.

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